hide
Free keywords:
High Energy Physics - Experiment, hep-ex
MPINP:
LHCb - Abteilung Hinton
Abstract:
The $B^{+}\to D^{+} K^{+} \pi^{-}$ decay is observed in a data sample
corresponding to $3.0\,{\rm fb}^{-1}$ of $pp$ collision data recorded by the
LHCb experiment during 2011 and 2012. The signal significance is $8\,\sigma$
and the branching fraction is measured to be ${\cal B}\left(B^{+}\to D^{+}
K^{+} \pi^{-}\right) = (5.31 \pm 0.90 \pm 0.48 \pm 0.35)\times 10^{-6}$, where
the uncertainties are statistical, systematic and due to the normalisation mode
$B^{+}\to D^{-} K^{+} \pi^{+}$, respectively. The Dalitz plot appears to be
dominated by broad structures. Angular distributions are exploited to search
for quasi-two-body contributions from $B^{+}\to D^{*}_{2}(2460)^{0}K^{+}$ and
$B^{+}\to D^{+} K^{*}(892)^{0}$ decays. No significant signals are observed and
upper limits are set on their branching fractions.
